MMW.
UFC · Boxing · IBJJF · lb / kg

Weight Class Calculator

Find your division in seconds. Enter your weight, choose a ruleset, and see exactly where you land — plus how much room you have before bumping up and how big a cut drops you down.

Weight Class
UFC / MMA

At 170 lb you are a

Welterweight

0 lbof room before you'd move up a class.

Cut 15 lb to make Lightweight.

Flyweightup to 125 lb
Bantamweight125 lb–135 lb
Featherweight135 lb–145 lb
Lightweight145 lb–155 lb
Welterweight◄ YOU155 lb–170 lb
Middleweight170 lb–185 lb
Light Heavyweight185 lb–205 lb
Heavyweight205 lb–265 lb
Super Heavyweightover 265 lb
Standard MMA unified-rules limits (at weigh-in).

Find your weight class

Whether you're stepping into the cage, the ring or a grappling tournament, the first question is always the same: which division? This free weight class calculator covers UFC/MMA unified rules, the traditional 17-division professional boxing ladder, and IBJJF adult gi grappling — for both men and women, in pounds or kilograms.

Plan your cut

The calculator doesn't just name your division — it shows the limit above and below, how much you can put on before you'd move up a class, and the exact cut needed to make the division beneath you. Useful for planning a fight-week weight cut, or just settling where a fighter really belongs. Then size up the matchup on the tale of the tape.

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